From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm1-x331.google.com (mail-wm1-x331.google.com [IPv6:2a00:1450:4864:20::331]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 2074B3CB36 for ; Sun, 24 Mar 2019 07:21:24 -0400 (EDT) Received: by mail-wm1-x331.google.com with SMTP id h18so6184030wml.1 for ; Sun, 24 Mar 2019 04:21:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heistp.net; s=google; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=KWE6r9aTXQ0fd6Vh3zEtPU4P9yYujlAzxUG6wuuvnE8=; b=h6IWVYxSze72QuhFwHGUi1iPAhHQ7xD8LgfxgZ7bTvPFAErO9EeRSNAn216xbMMZXd /FpucXiAfpRQp2CV8STGvBEsRaoeXXAVAjFU0pZ+xRaHVOkQEOhoSr9FN9Hm3DmtODkx Ku+32qPvR/zr82UVz/gzABrZWWp22OOgIjnIXLC9rf7uPW1Mw6ET2DzXbsg4l4OT6FHk p5U0BRI1fJGhF954OW+Ftp60LI0lrva2eKrEDAyyQRRQRfxgvp7xn8zDyv8s6+KsyE3R lPfPlWom1V1v74JV645Jqv9AcH2Yth5yvMxAfC+6S/ZT9MucsiBJoCdiKIiT2gbL3Z7u eedA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=KWE6r9aTXQ0fd6Vh3zEtPU4P9yYujlAzxUG6wuuvnE8=; b=A+mnlrhKpMbdlaOP2tvuBfJyClEqky52TF3DEKMBbmkvBGGQmMrz6G1AjPsc6Xzbcb ZtMl1EMOU+DDqdooDA/TWzZ2YGdQLfegA4qc85affmOMgJGTINsrVrhn8cqM2ExoLPPJ P0qWm2eix2y74y7cj+sDMhe7He7fwgPJ3nuFE+/CETkZQO1eWHYQ1mHB5/9yaCpzH/14 h8hBLYL6suMdIH40Lc7d2yXzB2ApJOV7XWE6jqRPLqrHf70hbDH1OHFqW/5ukG5AHTa/ PDMqS1cus7N4/H3qsWqC6qgnAqFXHHnhnPGQqhlPVe+fAQTBBZ9ulolW832kK+GX5V8h vZ5w== X-Gm-Message-State: APjAAAVKYehd34IjXnYa6auP7NvbK1MqS1h/SMK+0upmb8DA2nTjkZHt YydVOV/IyQttc2Qm6rH5wnfIVg== X-Google-Smtp-Source: APXvYqyLcZVHcOBS3CIbsXRaayMu4+P+ZgRJun79YWTAS9H6sAYlLeHT3buNU1jNR6uVBxKIxxiwGA== X-Received: by 2002:a1c:1d81:: with SMTP id d123mr2208024wmd.59.1553426483325; Sun, 24 Mar 2019 04:21:23 -0700 (PDT) Received: from [10.72.0.64] (h-1169.lbcfree.net. [185.193.85.130]) by smtp.gmail.com with ESMTPSA id y63sm14694526wmb.31.2019.03.24.04.21.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 24 Mar 2019 04:21:22 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Pete Heist In-Reply-To: Date: Sun, 24 Mar 2019 12:21:21 +0100 Cc: ecn-sane@lists.bufferbloat.net, Cake List Content-Transfer-Encoding: quoted-printable Message-Id: <753044B9-3E27-417E-9890-388234D5EDBB@heistp.net> References: <3F3F78F9-8F97-42F2-9005-F8449489BECF@gmail.com> <42B7B2FB-94FC-4CA6-B75E-CADB61FE3173@gmail.com> <6047E899-078F-4E08-A29C-B87D268A4E5E@heistp.net> <69EA569B-4AD2-4C4B-937B-9ABDD563B120@gmail.com> To: Jonathan Morton X-Mailer: Apple Mail (2.3445.9.1) Subject: Re: [Cake] The two SCE tests I have in mind X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 24 Mar 2019 11:21:24 -0000 > On Mar 24, 2019, at 12:08 PM, Jonathan Morton = wrote: >=20 >> On 24 Mar, 2019, at 12:05 pm, Pete Heist wrote: >>=20 >> tcpdump -r file.pcap udp port 2112 and greater 80 and "ip[1] !=3D = 0x1=E2=80=9D >>=20 >> =E2=80=9Cgreater 80=E2=80=9D ignores the handshake packets and 0x1 is = whatever TOS value we want to make sure the packets contain. We can use = different filters for other traffic. >=20 > Bear in mind that the TOS byte contains ECN as well as DSCP fields, = and the latter is left-justified. Indeed, I was playing with irtt to see if it gladly writes the whole = field including the ECN bits (it does). Better common examples we can = test for DSCP could be 0x10 or 0xb8.=